#panel-wrapper{
             width:60%;
             margin: auto;
             padding-top: 5vh;
             padding-bottom: 5vh;
           }


.responsive {
  width: 100%;
  height: auto;
}

.responsive {
  width: 100%;
  height: auto;
}

img.img-fluid{  
                width: 100%;
                height: auto;
             }

@media (max-width: 768px) { 
  #panel-wrapper{width:98%;}
  img.img-fluid{max-width:375px;}
}